I have a setup simular to yours. A Kmart tape player, 75' of extension cord,and an outdoor speaker. tape player is not the walkman size, its more breadbox size. it works well enough if I keep the volume down under 50%. after that it starts to distort. this worked even better after I added a decoy to this setup. its alot like the rigor rabbit. when the dogs have something to look at they seem less critical of my setup.